BERKELEY (KCBS) – It’s being called the most mysterious star ever detected, and now University of California, Berkeley astronomers are trying to determine if aliens exist on it.

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“Tabby’s Star” dims irregularly for days at a time, which has prompted speculation that some sort of structure, possibly built by extraterrestrial life is orbiting the star.

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Astronomers at Berkeley are using two of the world’s biggest radio telescopes to get to the bottom of the mystery.

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People anticipating alien life shouldn’t get too excited, as chief scientists on the project say there’s about a one in a billion chance that the structure was built by aliens.